Workarounded restoring focus to GAL canvas after layer switching.

pcbnew/pcbframe.cpp

@@ -830,6 +830,7 @@ void PCB_EDIT_FRAME::SetActiveLayer( LAYER_ID aLayer )
     if( IsGalCanvasActive() )
     {
         m_toolManager->RunAction( COMMON_ACTIONS::layerChanged );       // notify other tools
+        GetGalCanvas()->SetFocus();                 // otherwise hotkeys are stuck somewhere
         GetGalCanvas()->Refresh();
     }
 }

pcbnew/router/router_tool.cpp

@@ -532,9 +532,7 @@ void ROUTER_TOOL::performRouting()
     }
 
     m_router->SwitchLayer( m_startLayer );
-
     frame->SetActiveLayer( ToLAYER_ID( m_startLayer ) );
-    frame->GetGalCanvas()->SetFocus();
 
     if( m_startItem && m_startItem->Net() >= 0 )
         highlightNet( true, m_startItem->Net() );

pcbnew/tools/pcbnew_control.cpp

@@ -298,7 +298,6 @@ int PCBNEW_CONTROL::LayerSwitch( TOOL_EVENT& aEvent )
     else if( aEvent.IsAction( &COMMON_ACTIONS::layerBottom ) )
         m_frame->SwitchLayer( NULL, B_Cu );
 
-    m_frame->GetGalCanvas()->SetFocus();
     setTransitions();
 
     return 0;
@@ -325,8 +324,8 @@ int PCBNEW_CONTROL::LayerNext( TOOL_EVENT& aEvent )
     else
         ++layer;
 
+    assert( IsCopperLayer( layer ) );
     editFrame->SwitchLayer( NULL, ToLAYER_ID( layer ) );
-    editFrame->GetGalCanvas()->SetFocus();
     setTransitions();
 
     return 0;
@@ -355,7 +354,6 @@ int PCBNEW_CONTROL::LayerPrev( TOOL_EVENT& aEvent )
 
     assert( IsCopperLayer( layer ) );
     editFrame->SwitchLayer( NULL, ToLAYER_ID( layer ) );
-    editFrame->GetGalCanvas()->SetFocus();
     setTransitions();
 
     return 0;